<html window-frame="transparent">
    <head>
        <title>Test</title>
        <style>

html { background:transparent; }


body {
  background: #fff;
  margin:10dip; // to accomodate box-shadow
  box-shadow: 2dip 2dip 8dip #888888;
  border-radius: 5dip;
  padding:3dip;
}

body > header { flow:horizontal; }
body > header > caption { width:*; }

main { 
  size:*;
}


        </style>
        <script type="text/tiscript"></script>
    </head>
    <body>
      <header>
        <caption role="window-caption">Caption</caption>
        <button role="window-close">x</button>
      </header>
      <main>
        Content
      </main>    
      <footer>
        Footer
      </footer>
    </body>
</html>